It is good that you want to strategize and have a planned approach towards preparing for JEE. I am happy to see so many students so concerned and attentive to look for the best that they can from all the sources available.
You must keep this in mind. It is not always neccessary to join a tution or a coaching that every one is joining.. you must analyse yourself and find out the sooner it is possible that what is the most productive way for you.
Options being: Nearest Coaching, The best brand coaching or private tutions or online coaching.
The most important thing for you in these two years will be.. Time Management and Concentration..!!! set targets.. for every week.. that what all chapters are you gonna complete studying.. in physics chemistry and maths..
In many coaching centres the idea is that they teach 12th cass syllabus in 11th and 11th in 12 or every thing according to them.. this at times spoils everything for some of the students.. I have seen this happening very very commonly..
That is why I am cautioning you.. that you must analyze you every now and then.. ask yoursef questions.. like : If what i am doing right now is right for me..? and Am i able to perform this way..?? If I am not lagging behind..?
The Guru Mantra to crack JEE..!! Never Compromise on basics..!! how so many times do you need to study a particular chapter.. do not let it go till you are sure.. this is not your strongest subject even after giving your best.. And do not just jump on solving questions. Increase the level of questions that you attempt gradually ..
So keep this in mind.. that what ever you are going to study now is going to be asked in achieving your aim.. and also.. the better your basics are.. the more fun it is to prepare for JEE.
If you are satisfied in such things... you will make a fluent way to all the IITs... just be calm..and follow the zeal..!!! :) :)
Keep posting here.. all the doubts you have.. questions or career issues.. or anything... We are happy to answer you... And we can relate to what you are feeling right away and what you will be... in the coming 2 years.. We have been through the same.. :) :)
I wish you all the very good luck.. :)